摘要
采用以1-亚硝基-2-萘酚为螯合剂、Triton X-114为表面活性剂的新型浊点萃取体系富集水中的痕量铁,并用火焰原子吸收光谱法对铁进行测定。详细探讨了溶液pH值、表面活性剂浓度、络合剂浓度、平衡温度、平衡时间等对浊点萃取及测定灵敏度的影响,优化了实验条件。在最佳条件下测得铁的检出限(S/N=3)为0.42μg.L-1,富集倍数为32,校准曲线相关系数为0.996。应用该法测定海水、湖水及自来水中的痕量铁,结果满意。
A new cloud point extraction flame atomic absorption spectrometric （CPE -FAAS） method has been developed for the determination of trace iron. 1-Nitroso-2-naphthol was selected as the complexing agent and Triton X-114 as the surfactant. The influences of pH value, concentrations of surfactant and complexing agent, and equilibrium temperature and time on the cloud point extraction efficiency and sensitivity of the method were investigated. Under optimal conditions, the calibration curve was linear over the concentration range of 1.25-50μg·L^-1 with a correlation coefficient of 0. 996 and a detection limit of 0.42 μg·L^-1. The enrichment factor for iron was 32. The proposed method was applied satisfactorily in the determination of trace iron in sea water, lake water and tap water.
出处
《分析测试学报》
CAS
CSCD
北大核心
2008年第10期1128-1131,共4页
Journal of Instrumental Analysis
基金
国家自然科学基金资助项目(20571051)
上海市教育委员会重点学科建设项目资助(J50102)
上海市教育发展基金资助项目(06AZ097)
作者简介
边瑞香（1982-），女，河北泊头人，硕士研究生
通讯作者：丁亚平，Tel：02-66134734，E-mail：wdingyp@sina.com
